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This product is an expansion for Softube Modular. If you do not currently own Modular, you can purchase it HERE.

The thru-zero frequency modulation of Rubicon is ideal for experimenting with FM synthesis. Rubicon is an analog VCO design masterpiece, originially created by Dave Dixon with Intellijel. It is a unique Eurorack module, now offered as an add-on module for Modular.
Please Note:
- MODULAR (cross-platform modular synthesizer) is required to run this software!
Features:
- High precision emulated Triangle core
- Switchable linear and (for the first time in any module) exponential TZFM (through-zero FM)
- Linear index VCA for dynamic control of TZFM depth
- Symmetry control (full clockwise is normal, full counter-clockwise gives reversed waveforms, centered the VCO is at 0 Hz) with CV
- 12 primary waveform types: sine, sigmoid, double sigmoid, triangle, saw, double saw, zigzag, square, pulse (center modulated), pulse (edge modulated), double pulse
- Suboctave circuit with -1 and -2 octaves. The suboctave output is affected by fm just like the main signals
- Soft sync (also known as reversing sync) with attenuator
- Hard sync with selectable reset direction (determines if the triangle starts moving up or down after a reset, very useful in LFO mode)
- Pulse-width modulation and exponential FM with dedicated attenuators
- Requires Modular
System Requirements
- macOS Big Sur 11, Monterey 12, Ventura 13
- Windows 10 (64-bit), Windows 11
- Softube account
- iLok account
- Computer with AU, VST, VST3, and/or AAX-compatible DAW host software
- Internet access (for downloading installers and managing licenses)
Supported CPU Families
- Apple macOS computers with Intel Core i3/i5/i7 or Apple silicon (M1 or newer) CPU. Apple silicon is supported natively.
- Windows computers with quad-core Intel Core i3/i5/i7 or AMD quad-core processors with SSE 4.2 support.
- Other Intel processors (Celeron, Pentium, and Xeon) are compatible if they support SSE 4.2 instructions.
Supported Host Software (DAW)
Any 64-bit VST, VST3, AU, or AAX (Pro Tools 11.0.2 or higher) compatible host application should work. However, due to plug-in host differences between DAWs—and our rigorous standards—Softube only officially test their plug-ins and instruments in the most recent versions of Pro Tools, Logic Pro, Cubase, Ableton Live, Studio One, and Reaper. Softube plug-ins are not tested regularly in non-listed systems. They will likely work if the system requirements are met. However, the manufacturer cannot guarantee a solution for issues in unsupported systems.
Softube strongly recommend using VST3, as some of their plug-ins have features that are not present in the older VST format. Supported sample rates: 44.1, 48, 88.2, 96, 176.4, and 192 kHz, in both mono and stereo. The most recent maintenance release of your DAW application is recommended. AAX DSP is not currently in active development. TDM/VENUE/RTAS are no longer supported. See Legacy Installers.
- Softube Modular is required to run this software.
- Make sure that you always use the latest iLok License Manager. It is not included in the Softube installer but can be downloaded from www.ilok.com



































